anonymous
  • anonymous
one sec ill post a pic of the thingy :)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
here it is :)
1 Attachment
anonymous
  • anonymous
The dartboard or the discounts?
anonymous
  • anonymous
Dart board that ones next ;)

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anonymous
  • anonymous
Ok, a probability question. You have 4 darts and 3 possible values. It's a combination since the order of the darts doesn't matter.
anonymous
  • anonymous
so the values are 1,5,9 5,9,1 and 9,1,5?
anonymous
  • anonymous
Ah, sorry, it's a permutation.
anonymous
  • anonymous
oh ok
anonymous
  • anonymous
The formula for a permutation is n! over (n-r)!
anonymous
  • anonymous
n is 4, r is 3
anonymous
  • anonymous
so 1
anonymous
  • anonymous
Do you know factorial notation?
anonymous
  • anonymous
nope :/
anonymous
  • anonymous
Factorial is multiplying a number, then multiplying by one less, and it continues down to 1. So 4! is 4*3*2*1, and 1! is 1. 4*3*2*1 also happens to be your answer.
anonymous
  • anonymous
what does the * mean?
anonymous
  • anonymous
Multiply
anonymous
  • anonymous
so 24?
anonymous
  • anonymous
That's it.
anonymous
  • anonymous
thanks buddy :)
anonymous
  • anonymous
While it's open, might as well solve the other one too.
anonymous
  • anonymous
oh yeah thanks :)
anonymous
  • anonymous
Imagine you start at 100 dollars. What's 10 percent off of that?
anonymous
  • anonymous
10...
anonymous
  • anonymous
So 100-10 is 90. What is 20 percent of 90?
anonymous
  • anonymous
18?
anonymous
  • anonymous
Yep. 90-18 is 72. So 100-72 is your total discount.
anonymous
  • anonymous
Or 28%, to be exact.
anonymous
  • anonymous
oh ok thanks

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